package com.cy1;

public class SystemDemo {
    public static void main(String[] args) {
        System.out.println("开始");
//        System.exit(0);
        System.out.println("结束");
        System.out.println("-----------");
        System.out.println(System.currentTimeMillis());
        long a=System.currentTimeMillis();
        System.out.println("wo");
        long b=System.currentTimeMillis();
        System.out.println("该计算机1秒运行"+1.0/((b-a)/1000.0)+"次");
        String s = "祝你考出好成绩！";
        System.out.println(s.length());


    }
}
